const char  *vertexShaderCode =
    "#version 330\r\n"
    ""
    "in layout(location=0) vec3 position;"
    "in layout(location=1) vec3 vertexColor;"
    ""
    "out vec3 theColor;"
    ""
    "void main()"
    "{"
    "   gl_Position = vec4(position, 1.0);"
    "   theColor = vertexColor;"
    "}";

const char *fragmentShaderCode =
    "#version 330\r\n"
    ""
    "out vec4 daColor;"
    "in vec3 theColor;"
    ""
    "void main()"
    "{"
    "   daColor = vec4(theColor,1.0);"
    "}";
